While we sleep, one kind of slow brain wave helps to reinforce memories, but a competing wave weakens them.
About the author
Elena Renken is a science writer based in New York. She is a former editor-in-chief of the Brown Daily Herald at Brown University, where she earned a bachelor’s degree in science, technology and society. She has made videos for PBS NOVA, reported for The Providence Journal and written for SciLine, the communications service of AAAS.